Spatially varying small-strain stiffness in soils subjected to K0 loading

Handle URI:
http://hdl.handle.net/10754/625728
Title:
Spatially varying small-strain stiffness in soils subjected to K0 loading
Authors:
Kim, Hyun-Ki; Santamarina, Carlos ( 0000-0001-8708-2827 )
Abstract:
Grain-scale characteristics and formation history determine spatial variability in granular masses. We investigate the effect of spatially varying stiffness on the load-deformation response under zero-lateral strain conditions using numerical simulations of correlated random fields, where the granular medium is represented by a non-linear stress-dependent meso-scale model. Results show that stiffness heterogeneity results in higher global compressibility as compared to the homogeneous medium with the same arithmetic mean stiffness. Furthermore, the non-homogeneous stress field that develops inside the granular mass is characterized by focused load transfer along columnar regions, higher stress anisotropy and lower horizontal-to-vertical stress ratio K0 than in a granular medium of homogenous stiffness. As the applied stress increases, the inherent stress-dependent response of the granular material leads to a more homogenous stress field. While greater variance in stiffness causes lower global stiffness, a longer correlation length results in greater variance in global mechanical response among multiple realizations.
KAUST Department:
Earth Science and Engineering Program
Citation:
Kim H-K, Santamarina JC (2017) Spatially varying small-strain stiffness in soils subjected to K0 loading. KSCE Journal of Civil Engineering. Available: http://dx.doi.org/10.1007/s12205-017-0547-4.
Publisher:
Springer Nature
Journal:
KSCE Journal of Civil Engineering
Issue Date:
8-Aug-2017
DOI:
10.1007/s12205-017-0547-4
Type:
Article
ISSN:
1226-7988; 1976-3808
Sponsors:
This research was supported by a grant on Scale Effects in Soils from the National Science Foundation and on Hydrates from the Department of Energy and a grant (13SCIPS04) from Smart Civil Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport (MOLIT) of Korea government and Korea Agency for Infrastructure Technology Advancement (KAIA).
Additional Links:
https://link.springer.com/article/10.1007%2Fs12205-017-0547-4
Appears in Collections:
Articles; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Hyun-Kien
dc.contributor.authorSantamarina, Carlosen
dc.date.accessioned2017-10-03T12:49:36Z-
dc.date.available2017-10-03T12:49:36Z-
dc.date.issued2017-08-08en
dc.identifier.citationKim H-K, Santamarina JC (2017) Spatially varying small-strain stiffness in soils subjected to K0 loading. KSCE Journal of Civil Engineering. Available: http://dx.doi.org/10.1007/s12205-017-0547-4.en
dc.identifier.issn1226-7988en
dc.identifier.issn1976-3808en
dc.identifier.doi10.1007/s12205-017-0547-4en
dc.identifier.urihttp://hdl.handle.net/10754/625728-
dc.description.abstractGrain-scale characteristics and formation history determine spatial variability in granular masses. We investigate the effect of spatially varying stiffness on the load-deformation response under zero-lateral strain conditions using numerical simulations of correlated random fields, where the granular medium is represented by a non-linear stress-dependent meso-scale model. Results show that stiffness heterogeneity results in higher global compressibility as compared to the homogeneous medium with the same arithmetic mean stiffness. Furthermore, the non-homogeneous stress field that develops inside the granular mass is characterized by focused load transfer along columnar regions, higher stress anisotropy and lower horizontal-to-vertical stress ratio K0 than in a granular medium of homogenous stiffness. As the applied stress increases, the inherent stress-dependent response of the granular material leads to a more homogenous stress field. While greater variance in stiffness causes lower global stiffness, a longer correlation length results in greater variance in global mechanical response among multiple realizations.en
dc.description.sponsorshipThis research was supported by a grant on Scale Effects in Soils from the National Science Foundation and on Hydrates from the Department of Energy and a grant (13SCIPS04) from Smart Civil Infrastructure Research Program funded by Ministry of Land, Infrastructure and Transport (MOLIT) of Korea government and Korea Agency for Infrastructure Technology Advancement (KAIA).en
dc.publisherSpringer Natureen
dc.relation.urlhttps://link.springer.com/article/10.1007%2Fs12205-017-0547-4en
dc.subjectspatial variabilityen
dc.subjecteffective stiffnessen
dc.subjectK0 coefficienten
dc.subjectuniaxial compactionen
dc.subjectzero-lateral strain loadingen
dc.titleSpatially varying small-strain stiffness in soils subjected to K0 loadingen
dc.typeArticleen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journalKSCE Journal of Civil Engineeringen
dc.contributor.institutionSchool of Civil & Environmental Engineering, Kookmin University, Seoul, Koreaen
kaust.authorSantamarina, Carlosen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.